Global heatmap is a great way to see what roads are well travelled by fellow athletes. The idea here is to add a dimension to the global heatmap similar to google maps "Typical Traffic" layer overlay to show what time of a given week is most popular. Some route options may show up as well travelled, but may not be viable at certain times of the week due to vehicular traffic. I.e., some roads may be saturated with cyclists on a weekend morning but not on a weekday. This type of feature could also be a good way to better identify commute data if integrated with Strava Metro.